1*0a6a1f1dSLionel Sambuc /* ===-- subvti3.c - Implement __subvti3 -----------------------------------=== 2*0a6a1f1dSLionel Sambuc * 3*0a6a1f1dSLionel Sambuc * The LLVM Compiler Infrastructure 4*0a6a1f1dSLionel Sambuc * 5*0a6a1f1dSLionel Sambuc * This file is dual licensed under the MIT and the University of Illinois Open 6*0a6a1f1dSLionel Sambuc * Source Licenses. See LICENSE.TXT for details. 7*0a6a1f1dSLionel Sambuc * 8*0a6a1f1dSLionel Sambuc * ===----------------------------------------------------------------------=== 9*0a6a1f1dSLionel Sambuc * 10*0a6a1f1dSLionel Sambuc * This file implements __subvti3 for the compiler_rt library. 11*0a6a1f1dSLionel Sambuc * 12*0a6a1f1dSLionel Sambuc * ===----------------------------------------------------------------------=== 13*0a6a1f1dSLionel Sambuc */ 14*0a6a1f1dSLionel Sambuc 15*0a6a1f1dSLionel Sambuc #include "int_lib.h" 16*0a6a1f1dSLionel Sambuc 17*0a6a1f1dSLionel Sambuc #ifdef CRT_HAS_128BIT 18*0a6a1f1dSLionel Sambuc 19*0a6a1f1dSLionel Sambuc /* Returns: a - b */ 20*0a6a1f1dSLionel Sambuc 21*0a6a1f1dSLionel Sambuc /* Effects: aborts if a - b overflows */ 22*0a6a1f1dSLionel Sambuc 23*0a6a1f1dSLionel Sambuc COMPILER_RT_ABI ti_int __subvti3(ti_int a,ti_int b)24*0a6a1f1dSLionel Sambuc__subvti3(ti_int a, ti_int b) 25*0a6a1f1dSLionel Sambuc { 26*0a6a1f1dSLionel Sambuc ti_int s = a - b; 27*0a6a1f1dSLionel Sambuc if (b >= 0) 28*0a6a1f1dSLionel Sambuc { 29*0a6a1f1dSLionel Sambuc if (s > a) 30*0a6a1f1dSLionel Sambuc compilerrt_abort(); 31*0a6a1f1dSLionel Sambuc } 32*0a6a1f1dSLionel Sambuc else 33*0a6a1f1dSLionel Sambuc { 34*0a6a1f1dSLionel Sambuc if (s <= a) 35*0a6a1f1dSLionel Sambuc compilerrt_abort(); 36*0a6a1f1dSLionel Sambuc } 37*0a6a1f1dSLionel Sambuc return s; 38*0a6a1f1dSLionel Sambuc } 39*0a6a1f1dSLionel Sambuc 40*0a6a1f1dSLionel Sambuc #endif /* CRT_HAS_128BIT */ 41